Daimler-Chrysler Jeep VIN Equipment Codes

4th digit - Gross Vehicle Weight Rating (GVWR)
E3,001 - 4,000 lbs.
F4,001 - 5,000 lbs.
G5,001 - 6,000 lbs.
H6,001 - 7,000 lbs.
5th digit - line
B4×2 Cherokee; right hand drive
J4×4 Cherokee; left hand drive
N4×4 Cherokee; right hand drive
SGrand Wagoneer
T4×2 Cherokee; left hand drive
X4×2 Grand Cherokee; left hand drive
Y4×4 Wrangler; left hand drive
Z4×4 Grand Cherokee; left hand drive
6th digit - series
1Sport
2SE
3Pioneer & Islander
4Sahara
5Grand & Laredo
6Sport & Eliminator
7Limited & Country
 
7th digit - body type
54-door wagon
72-door wagon
84-door wagon
92-door open body
8th digit - engine
P2.5L 4 cyl.
S4.0L
Y5.2L V8
75.9L I6 24-valve HO diesel
11th digit - assembly plant
AAuburn Hills
CDetroit, Michigan
JBrampton, Ontario
LToledo, Ohio#1
PToledo, Ohio#2

Information from Auto Insurance Tips' "Decoding The Jeep VIN".